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What is fire?

  1. Mar 3, 2005 #1
    What is fire?
  2. jcsd
  3. Mar 3, 2005 #2
    Hot stuff. :tongue2:

    The Bob (2004 ©)
  4. Mar 3, 2005 #3
    Ah, a PHILOSOPHICAL question! To the alchemists of old, it's one of the four Elements. To mystics and magicians, it's the principle of warmth, expansion, creativity...the "Yod" of the four-fold unutterable Tetragrammaton (YHVH). But...perhaps you were after a less esoteric answer? ;) Fire, as we know it, is a phenomenon that often accompanies oxidation. There are two aspects to such oxidation that must occur for it to usually be called "fire": 1) The reaction must be self-sustaining, ie, it must liberate more heat than is required to initiate it. 2) It must produce a flame, which is caused by the luminosity of ions, and/or hot particles.
  5. Mar 8, 2005 #4
    incandescent gas
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